An obligate parasite, or holoparasite, is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host.
Part of the Andes mountain range, Aconcagua is the second highest of the Seven Summits, behind only Mount Everest in Asia. At 22,837 feet (6,961 meters), not only is it the highest mountain in South America, it is the tallest peak in all of the Americas as well as the Southern and Western Hemispheres.
The Western Hemisphere is a geographical term for the half of the Earth that lies west of the Prime Meridian (which crosses Greenwich, London, United Kingdom) and east of the Antimeridian, the other half being called the Eastern Hemisphere. Norway (due to Jan Mayen; mainland Norway lies entirely in the Eastern Hemisphere). 2  United Kingdom. 3  Netherlands (The islands of the Netherlands Antilles lie entirely within the Western Hemisphere while the European Netherlands lies entirely in the Eastern Hemisphere).